EP0282301A2 - Desodoriervorrichtung - Google Patents

Desodoriervorrichtung Download PDF

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Publication number
EP0282301A2
EP0282301A2 EP88302088A EP88302088A EP0282301A2 EP 0282301 A2 EP0282301 A2 EP 0282301A2 EP 88302088 A EP88302088 A EP 88302088A EP 88302088 A EP88302088 A EP 88302088A EP 0282301 A2 EP0282301 A2 EP 0282301A2
Authority
EP
European Patent Office
Prior art keywords
ozone
motor
ozone generator
air
control means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88302088A
Other languages
English (en)
French (fr)
Other versions
EP0282301B1 (de
EP0282301A3 (en
Inventor
Jungi Miyakami
Yuzo Yoshioka
Kazuhiko Otoji
Hiroyasu Nakagawa
Toshiyuki Shirouzu
Fumio Yada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1987037520U external-priority patent/JPH0417152Y2/ja
Priority claimed from JP1987044989U external-priority patent/JPH0417153Y2/ja
Priority claimed from JP4499087U external-priority patent/JPS63152627U/ja
Priority claimed from JP1987059013U external-priority patent/JPH0415220Y2/ja
Priority claimed from JP1987060501U external-priority patent/JPH0415221Y2/ja
Priority claimed from JP6036987U external-priority patent/JPS63168021U/ja
Priority claimed from JP6089287U external-priority patent/JPS63169142U/ja
Priority claimed from JP1987062918U external-priority patent/JPH0415222Y2/ja
Priority claimed from JP11021187U external-priority patent/JPS6416583U/ja
Priority to AT88302088T priority Critical patent/ATE98875T1/de
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP0282301A2 publication Critical patent/EP0282301A2/de
Publication of EP0282301A3 publication Critical patent/EP0282301A3/en
Publication of EP0282301B1 publication Critical patent/EP0282301B1/de
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • A61L9/122—Apparatus, e.g. holders, therefor comprising a fan
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0415—Treating air flowing to refrigeration compartments by purification by deodorizing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0416—Treating air flowing to refrigeration compartments by purification using an ozone generator

Definitions

  • the present invention relates to a deodorizing apparatus for use in storage chambers such as refrigerators for removing odors from air by converting the oxygen in the air to ozone.
  • active carbon is used, for example, in refrigerators for removing the odors released from the foods stored therein, utilizing the adsorbing property of the carbon.
  • active carbon needs replacement every time it has adsorbed odors to saturation.
  • Active carbon further has the drawback of necessitating replace­ment at a short interval of time since it is difficult to recognize whether the saturation has been reached.
  • deodorizing apparatus have already been proposed in which some of the oxygen in odor-containing air is converted by silent discharge to ozone, which is then reacted with the air on the surface of a catalyst for deodorization.
  • these deodorizing apparatus the components of odors are decomposed on oxidation by the deodorizing catalyst activated with ozone, and at the same time, an excess of ozone is decomposed to oxygen (2O3 ⁇ 3O2), which is discharged from the apparatus.
  • 2O3 ⁇ 3O2 See, for example, Examined Japanese Utility Model Publication SHO 60-­24351.
  • the conventional deodorizing apparatus has the drawback that when the electric motor thereof stops its operation owing to a malfunction or for some other cause, the remaining ozone flows out of the case through an air inlet, producing an adverse influence on the interior material of the storage chamber and on the food stored therein.
  • the apparatus has another drawback.
  • the deodor­izing catalyst when used for a prolonged period of time, exhibits a decreased ozone decomposition efficiency, increasing the amount of residual ozone in the oxygen flowing out of the apparatus and giving a higher residual ozone concentration to the interior of the storage chamber to adversely affect the interior material and the stored food.
  • the present invention provides a deodorizing apparatus comprising a case having an air inlet and an air outlet, an ozone generator of the discharge type disposed in an air flow channel between the air inlet and the air outlet, acceleration means disposed in the air flow channel at the air outlet side thereof for accelerating the decomposition of odors and ozone, a fan provided within the case, an electric motor provided within the case for driving the fan, and means disposed in the air flow channel at the air inlet side thereof for preventing an excess of ozone from flowing out.
  • the preventing means is second means for accelerating the decomposition of odors and ozone.
  • the preventing means may be the electric motor when the motor is disposed in the air flow channel at the air inlet side thereof.
  • the invention provides a deodorizing apparatus of the type described above which is characterized in that the residual ozone is in no way allowed to flow out of the case of the apparatus even if the electric fan stops its operation.
  • the ozone generator is operated intermittently at a specified interval so as to produce a predetermined amount of ozone in accordance with the capacity and construction of the storage chamber in which the deodor­izing apparatus is installed. Additionally, the ozone concentration within the storage chamber is made readily controllable to not higher than a given regulation value, utilizing such variations in the interior ozone concentra­ tion that it increases owing to the presence of residual ozone while the generator is in operation but decreases by virtue of the spontaenous decomposition of ozone to oxygen (2O3 ⁇ 3O2), leakage, etc. while the generator is out of operation.
  • Fig. 1 shows the basic construction of a deodor­izing apparatus embodying the invention.
  • the apparatus of Fig. 1 has a case 1a providing an air flow channel 1 and having at its front and rear ends an air inlet 2 for taking in air containing odors and an air outlet 3.
  • the upstream end of the air flow channel 1 where the inlet 2 is positioned for the air to start flowing through the channel is provided with a deodorizing catalyst 4 resembling a plate of honeycomb structure for accelerating the decomposition of the odors and ozone.
  • a high voltage generating unit 5 is disposed in the channel 1 downstream from the catalyst 4.
  • an ozone generator 6 Disposed in the channel downstream from the unit 5 is an ozone generator 6 which comprises a high-voltage electrode 7, a low-voltage electrode 8 and an electrode support 9.
  • the air flow channel 1 is further provided with a deodorizing catalyst 10 similar to the catalyst 4 and positioned downstream from the ozone generator 6, a motor 11 and a fan 12 attached to the motor 11.
  • the deodorizing catalysts 4, 10 have catalytic activity to adsorb or decompose odor components and also to decompose an excess of ozone. More specifically, these catalysts comprise a composite substrate of titania with silica and manganese oxide coating the substrate surface.
  • the motor 11 rotates the fan 12, whereby odor-containing air is taken into the apparatus through the air inlet 2.
  • a high voltage is supplied from the high voltage generating unit 5 to the ozone generator 6, giving rise to a silent discharge across the high-voltage electrode 7 and the low-voltage electrode 8.
  • the air introduced into the channel 1 is sent toward the air outlet 3 by the fan 12, a portion of the air has its oxygen converted to ozone (O3) by the silent discharge.
  • the air flowing into the case 1a contains odor components and passes through the deodorizing catalyst 10 along with the ozone produced by the generator 6.
  • the catalyst 10 activated with the ozone, decomposes the odor components on oxidation, and at the same time, decomposes an excess of ozone to oxygen (2O3 ⁇ 3O2), which is then send out from the case 1a through the outlet 3.
  • the fan 12 only is out of operation owing to a malfunction or for some other cause while the ozone generator 6 is in normal operation, the air does not always flow from the inlet 2 toward the outlet 3 (forward flow) but is likely to flow from the outlet 3 toward the inlet 2 (reverse flow).
  • the ozone within the apparatus is decomposed to oxygen by the deodorizing catalyst 4 before passing through the inlet 2. This eliminates the likelihood of the remaining ozone flowing out from the inlet 2, rendering the apparatus usable with improved safety.
  • Fig. 2 is a perspective view showing the basic construction of another embodiment of the invention.
  • the deodorizing apparatus of Fig. 2 has an upright case 1b providing an air flow channel 1 and has at its lower and upper ends an air inlet 2 for taking in odor-containing air and an air outlet 3, respectively. Between the inlet 2 and the outlet 3, the channel 1 is provided with a motor 11, fan 12 attached to the motor 11, ozone generator 6 and honeycomb deodorizing catalyst 10 which are arranged downstream from the inlet 2 toward the outlet 3 in the order mentioned.
  • the motor 11 When the apparatus is driven, the motor 11 is driven to rotate the fan 12, whereby odor-containing air is taken into the flow channel 1, while a silent discharge occurs in the ozone generator 6 across a high-voltage electrode 7 and a low-voltage electrode 8 to produce ozone.
  • the air taken into the channel 1 is sent toward the outlet 3 by the fan.
  • the odor components in the air come into contact with the deodorizing catalyst 10 which is activated by the ozone and are thereby subjected to accelerated oxidation to decompose into odorless components.
  • An excess of oxygen is also decomposed to oxygen when passing through the catalyst 10.
  • Deodorizing apparatus of the basic constructions of Figs. 1 and 2 are divided generally into those of the unit type which can be removably installed in storage chambers such as refrigerators, and those which are incorporated into storage chambers.
  • Fig. 3 is a perspective view of a deodorizing apparatus of the unit type having the basic construction of Fig. 1
  • Fig. 4 is a view partly in section and showing the same
  • Fig. 5 is a diagram showing the electric circuit of the apparatus of Fig. 3.
  • These drawings show a transformer case 13 housing a transformer 14 for step­ping down a.c. 100 V to a.c. 23 V, blades 15a, 15b connected to the primary winding of the transformer 14 and to be inserted into an a.c.
  • the case 1a When the apparatus is to be used, the case 1a is placed on a shelf within an unillustrated refrigerator having a door, the forward end of the cable 17 is withdrawn from the refrigerator through a clearance between the refrigerator body and its door, and the cable 17 is fixed to the inner wall of the refrigerator with an adhesive tape.
  • the blades 15a, 15b are inserted into an a.c. 100 V receptable on the interior wall of the room to fix the case 13.
  • the plug 16b at the cable end is inserted into the jack 16a, thereby turning on the LED 18 and driving the motor 11 and the ozone generator 6.
  • the odor-containing air within the refrigerator is taken into the case 1a, deodorized and discharged therefrom as indicated by arrows in Fig. 4.
  • the transformer 14 serves to step down the voltage to be supplied by the two-core cable 17 and to permit the use of the cable 17 of reduced size which can be drawn out from the refrigerator.
  • Fig. 6 is a view illustrating the interior arrangement of a refrigerator having incorporated therein the apparatus of Fig. 1
  • Fig. 7 is a view showing the apparatus of Fig. 2 as similarly incorporated into a refrigerator.
  • indicated at 21 is the refrigerator, at 22 the door thereof, at Sd a door switch which is operable with the closing of the door, and at 23 a temperature sensor for detecting the internal temperature of the refrigerator.
  • the air flow channel 1 is U-shaped, and the fan 12, which is disposed at the air outlet 3, is driven by the motor 11 which is positioned at the air inlet 2.
  • Fig. 8 is a fragmentary block diagram showing a control circuit for controlling the deodorizing apparatus of Fig. 6, as well as of Fig. 7.
  • the control circuit includes a microcomputer 24 comprising a ROM, RAM, CPU and I/O ports, a 100 V a.c. power supply 25, switching elements Sf, So, such as triacs or relay contacts, a current detecting circuit 26 for detecting the presence or absence of the current for driving the motor 11, and a constant-voltage circuit 27.
  • the power supply 25 supplies power to the motor 11 via the switching element Sf and the current detecting circuit 26 and also to the high voltage generating unit 5 by way of the switching elements Sf, So and the constant-voltage circuit 27.
  • the microcomputer 24 receives signals from the door switch Sd, the temperature sensor 23 and the current detecting circuit 26 to control the on-off operation of the switching elements Sf, So.
  • Fig. 9 is a time chart showing the operations of the switching elements Sf, So and the door switch Sd
  • Fig. 10 is a time chart showing a change in the on-­period of the switching element So controlled according to the output of the temperature sensor 23.
  • the microcomputer 24 includes timers (Ta timer and Tb timer), which function to hold the switching element So on during a period of time Ta, maintaining the ozone generator 6 in operation during this period (Ta mode), and to subsequently hold the switching element So off during a time interval Tb, maintaining the ozone generator 6 out of operation during this interval (Tb mode) as shown in Fig. 9.
  • Ta is set to 10 minutes
  • Tb to 20 minutes, in view of the capacity of the refrigerator 21 and the ability of the deodorizing catalyst 10.
  • the ozone generator 6 is driven intermittently for 10 minutes at intervals of 20 minutes.
  • the ozone decomposition efficiency of the deodorizing catalyst 10 is not always 100% but gradually decreases while in use for a long period of time, permitting the residual ozone to flow out from the air outlet 3 into the refrigerator, with the result that the ozone concentration in the refrigerator exceeds a given regulation value in several tens of years.
  • the ozone generator 6 is driven intermittently at the above-mentioned interval so as to maintain the interior ozone concentration below the regulation value at all times. Consequently, the interior ozone concentration will not exceed the regula­tion value of 0.1 ppm for 20 years, rendering the deodor­izing apparatus operable with exceedingly high safety.
  • the microcomputer 24 further has incorporated therein a long-period timer (3-day timer for measuring the period of 3 days in the present embodiment), which functions to forcibly turn off the ozone generator 6 and the motor 11 if the door 22 is held closed for more than a specified period of time, i.e. for more than 3 days, to prevent an increase in the interior ozone concentration.
  • the opening or closing of the door produces no variations in the on-period or off-interval of the apparatus.
  • the ozone generator 6 and the motor 11 are forcibly deenergized to prevent the interior ozone concentration from increasing.
  • the ozone generator has the problem that the silent dicharge is affected by the temperature and humidity around the discharge electrodes, hence variations in the amount of ozone produced. Additionally, odors are perceived strongly at high temperatures but less strongly at low temperatures, so that there is a need to control the deodorizing apparatus according to the temperature.
  • the present embodiment is therefore adapted to control the amount of ozone to be produced according to the internal temperature of the refrigerator detected by the temperature sensor 23. More specifically, the apparatus is driven intermittently with a cycle wherein the switching element So is on (for the production of ozone) for 10 minutes and off for 20 minutes as shown in Fig. 10 (a) while the internal temperature Th is not lower than a set temperature Ts (5° C), whereas if the temperature Th becomes lower than the set temperature Ts, the cycle is so changed that the switching element So is on for 7 minutes and off for 20 minutes as seen in Fig. 10 (b) to decrease the amount of ozone to be produced.
  • a plurality of temperature settings may be provided to give a more minutely altered time ratio for the intermittent operation to control the amount of ozone relative to the internal temperature Th. If the intermittent operation time ratio is adjusted similarly using a humidity sensor instead of the tempera­ture sensor 23, the decrease in the amount of ozone due to an increase in humidity can be compensated for.
  • the motor 11 is controlled by the switching element Sf, which in turn is turned on and off by signals from the microcomputer 24.
  • the ON signal for the switching element Sf is given earlier than the ON signal for the switching element So for operating the high voltage generating unit 5 by a period of time t1.
  • the OFF signal for the switching element Sf is produced a period of time t2 after an OFF signal is given to the switching element So.
  • the motor 11 when the high voltage generating unit 5 is to be operated, the motor 11 is first operated, and the unti 5 is initiated into operation the period of time t1 thereafter. Further upon lapse of the specified time t2 after the unit 5 is brought out of operation, the motor 11 is deenergized.
  • This mode of control causes the residual ozone to flow in the forward direction, preventing the ozone from reversely flowing out from the case 1a through the air inlet 2 especially in the case of the deodorizing apparatus shown in Fig. 7.
  • the motor 11 may be operated continuously independently of the intermittent operation of the ozone generator 6, the motor 11 is driven intermittently as described above, so as to be serviceable for a prolonged period of time and also for savings in power.
  • the residual ozone is converted to oxygen by the deodorizing catalyst 4, so that the motor 11 may be operated inter­mittently at the same interval as the ozone generator 6.
  • the current detecting circuit 26 comprises a resistor R1 connected in series with the motor 11, a series circuit connected in parallel with the resistor R1 and including a resistor R2, diode 28 and capacitor 29, and a series circuit connected to opposite ends of the capacitor 29 and includ­ing a resistor R3 and photocoupler 30.
  • the resistor R1 produces a very low a.c. voltage, which is converted to a d.c. voltage by the diode 28 and the capacitor 29. Consequently, the light-emitting diode in the photocoupler 30 is turned on, and the phototransistor therein is also brought into conduction, thereby indicating to the microcomputer 24 that the motor 11 is in normal operation. If a break occurs in the motor 11, on the other hand, no current flows through the resistor R1, giving no voltage to the capacitor 29 and consequently turning off the light-­emitting diode within the photocoupler 30. This indicates that the motor 11 is out of operation.
  • the high voltage generating unit 5 When a break in the motor 11 is detected, the high voltage generating unit 5 is deenergized, causing the ozone generator 6 to discontinue the production of ozone. More specifically, if a break occurs in the motor 11 to stop the fan 12 for one cause or another during the operation of the deodorizing apparatus, the current detecting circuit 26 detects this for the reason given above, whereupon the microcomputer 24 functions to deenergize the high voltage generating unit 5. Consequently, the ozone generator 6 produces no ozone, precluding the outflow of ozone due to the stopping of the motor 11.
  • the switching elements Sf and So are connected into the control circuit as will be described below.
  • the switching element Sf is connected in series with a parallel circuit comprising the motor 11 and the series circuit of the high voltage generating unit 5 and the switching element So.
  • the switching element So is held turned on at all times owing to a malfunction. Even then, the high voltage generating unit 5 is not energized, and the ozone generator 6 produces no ozone unless the switching element Sf is turned on, i.e. unless the motor 11 is driven. Incidentally, should ozone be produced while the motor 11 is at a stop, ozone would flow into the re­frigerator and pose a great hazard especially in the case of the embodiments shown in Figs. 2 and 7.
  • the switching element Sf malfunctions and does not close for one cause or another, the high voltage generating unit 5 similarly remains unenergized, and the ozone generator 6 produces no ozone.
  • the construction described above obviates the continuous production of ozone due, for example, to the malfunction or failure of the switching elements Sf, So, assuring the deodorizing apparatus of high safety.
  • Fig. 12 shows diodes 31, 32, 33, a thyristor 34 connected in series with a primary winding 35, a secondary winding 36 connected to the ozone generator 6, resistors 37, 38, 39, and capacitors 40, 41.
  • a high voltage is applied to the ozone generator 6 by the charging and discharging of the capacitor 41 and the conduction and nonconduction of the thyristor 34.
  • the amount of ozone to be produced by the generator 6 varies with the voltage applied from the high voltage generating unit 5 and must therefore be made constant by applying a constant voltage to the generator 6. More specifically stated with reference to Fig. 13, curve (A), the amount of ozone to be produced varies with the primary voltage of the unit 5, which therefore needs to be made constant.
  • the constant-voltage circuit 27 provided for the high voltage generating unit 5 according to the invention makes it possible to apply a constant voltage to the ozone generator 6, enabling the generator to pro­duce ozone in a constant amount as shown in Fig. 13, curve (B), and assuring the apparatus of a stabilized deodorizing operation.
  • constant voltage refers to the second­aly voltage of the unit 5 whose variations are up to ⁇ 5% relative to a standard value even if the primary voltage of the unit varies in the range of 80 to 120 V.
  • step 101 the control system is initialized (step 101).
  • step 102 the sequence shown in the flow charts proceeds from step to step at intervals of 0.1 second as measured by an internal timer of the micro­computer 24, so that upon lapse of 0.1 second (step 102),the door 22 is checked. If it is found closed with the door switch Sd off, the three-day timer is started (steps 103, 104). While the three-day timer is in counting operation (step 105), Ta mode follows (step 106), in which both the switching elements Sf, So are turned on (step 107).
  • the Ta timer is started (step 109).
  • Tb mode is executed (step 112). If Th is lower than Ts in step 110 and upon lapse of time Ta of 7 minutes (step 113), Tb mode is executed.
  • Tb mode when the time Tb measured by the Tb timer is up to t1 (step 114), the switching element Sf only is turned on.
  • both the switching elements Sf, So are turned off, or if Tb ⁇ t2 + t3, the switching element Sf only is turned on (step 116 or 117).
  • Ta mode follows again (step 120).
  • both the switching elements Sf, So are turned off (step 121).
  • the three-­day timer is reset (step 123). If the door 22 is opened in Ta or Tb mode (step 103), both the switching elements Sf, So are turned off, and the three-day timer is reset (steps 124, 123).
  • the deodorizing apparatus according to the present invention can be conveniently installed in re­frigerators as explained above and also in other closed chambers such as cabins of automobiles.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
EP88302088A 1987-03-13 1988-03-10 Desodoriervorrichtung Expired - Lifetime EP0282301B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88302088T ATE98875T1 (de) 1987-03-13 1988-03-10 Desodoriervorrichtung.

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
JP37520/87U 1987-03-13
JP1987037520U JPH0417152Y2 (de) 1987-03-13 1987-03-13
JP4499087U JPS63152627U (de) 1987-03-25 1987-03-25
JP44990/87U 1987-03-25
JP44989/87U 1987-03-25
JP1987044989U JPH0417153Y2 (de) 1987-03-25 1987-03-25
JP59013/87U 1987-04-17
JP1987059013U JPH0415220Y2 (de) 1987-04-17 1987-04-17
JP1987060501U JPH0415221Y2 (de) 1987-04-20 1987-04-20
JP60501/87U 1987-04-20
JP60369/87U 1987-04-21
JP6036987U JPS63168021U (de) 1987-04-21 1987-04-21
JP60892/87U 1987-04-22
JP6089287U JPS63169142U (de) 1987-04-22 1987-04-22
JP62918/87U 1987-04-24
JP1987062918U JPH0415222Y2 (de) 1987-04-24 1987-04-24
JP11021187U JPS6416583U (de) 1987-07-17 1987-07-17
JP110211/87U 1987-07-17

Publications (3)

Publication Number Publication Date
EP0282301A2 true EP0282301A2 (de) 1988-09-14
EP0282301A3 EP0282301A3 (en) 1990-04-18
EP0282301B1 EP0282301B1 (de) 1993-12-22

Family

ID=27576904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88302088A Expired - Lifetime EP0282301B1 (de) 1987-03-13 1988-03-10 Desodoriervorrichtung

Country Status (5)

Country Link
US (1) US4904289A (de)
EP (1) EP0282301B1 (de)
KR (1) KR950006933B1 (de)
AU (1) AU610566B2 (de)
DE (1) DE3886433T2 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008144A1 (de) * 1989-03-17 1990-09-20 Tdk Corp Sterilisier- und desodoriervorrichtung
EP0390159A2 (de) * 1989-03-31 1990-10-03 Matsushita Electric Industrial Co., Ltd. Gerät zum Deodorieren mit Ozon
EP0397145A2 (de) * 1989-05-09 1990-11-14 Matsushita Electric Industrial Co., Ltd. Ozondesodorisiervorrichtung für Kühlschränke
EP0431648A1 (de) * 1989-12-08 1991-06-12 Uop System zur Reduzierung der Verschmutzung
ES2073960A2 (es) * 1992-04-29 1995-08-16 Fagor S Coop Ltda Perfeccionamientos en la patente de invencion 9200894 por: "mejoras introducidas en los medios anticondensacion de aparatos frigorificos domesticos"
GB2273048B (en) * 1992-11-24 1997-04-09 Mitsubishi Electric Corp Microbe propagating preventing apparatus
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US5752878A (en) * 1994-10-13 1998-05-19 Balkany; Alexander Apparatus and method for treating air in a building
GB2374662A (en) * 2001-01-11 2002-10-23 Ozone Ind Ltd An air freshener and an ozone generator
FR3100315A1 (fr) * 2019-08-27 2021-03-05 Natéosanté purificateur d’air avec production et capture d’ozone.
EP4012303A1 (de) * 2020-12-14 2022-06-15 Whirlpool Corporation Kühlschranksystem

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DE4008144A1 (de) * 1989-03-17 1990-09-20 Tdk Corp Sterilisier- und desodoriervorrichtung
EP0390159A2 (de) * 1989-03-31 1990-10-03 Matsushita Electric Industrial Co., Ltd. Gerät zum Deodorieren mit Ozon
EP0390159A3 (de) * 1989-03-31 1992-02-26 Matsushita Electric Industrial Co., Ltd. Gerät zum Deodorieren mit Ozon
EP0397145A2 (de) * 1989-05-09 1990-11-14 Matsushita Electric Industrial Co., Ltd. Ozondesodorisiervorrichtung für Kühlschränke
EP0397145A3 (de) * 1989-05-09 1992-03-25 Matsushita Electric Industrial Co., Ltd. Ozondesodorisiervorrichtung für Kühlschränke
EP0431648A1 (de) * 1989-12-08 1991-06-12 Uop System zur Reduzierung der Verschmutzung
ES2073960A2 (es) * 1992-04-29 1995-08-16 Fagor S Coop Ltda Perfeccionamientos en la patente de invencion 9200894 por: "mejoras introducidas en los medios anticondensacion de aparatos frigorificos domesticos"
GB2273048B (en) * 1992-11-24 1997-04-09 Mitsubishi Electric Corp Microbe propagating preventing apparatus
GB2302653B (en) * 1992-11-24 1997-04-09 Mitsubishi Electric Corp Microbe propagation preventing apparatus
US5752878A (en) * 1994-10-13 1998-05-19 Balkany; Alexander Apparatus and method for treating air in a building
GB2374662A (en) * 2001-01-11 2002-10-23 Ozone Ind Ltd An air freshener and an ozone generator
GB2374662B (en) * 2001-01-11 2003-10-22 Ozone Ind Ltd Air treatment system
FR3100315A1 (fr) * 2019-08-27 2021-03-05 Natéosanté purificateur d’air avec production et capture d’ozone.
EP4012303A1 (de) * 2020-12-14 2022-06-15 Whirlpool Corporation Kühlschranksystem
US11384974B2 (en) 2020-12-14 2022-07-12 Whirlpool Corporation Refrigerator system

Also Published As

Publication number Publication date
KR950006933B1 (ko) 1995-06-26
DE3886433D1 (de) 1994-02-03
US4904289A (en) 1990-02-27
EP0282301B1 (de) 1993-12-22
EP0282301A3 (en) 1990-04-18
DE3886433T2 (de) 1994-07-07
KR880010782A (ko) 1988-10-24
AU1281688A (en) 1988-09-15
AU610566B2 (en) 1991-05-23

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